IV. RESEARCH PLAN
a. Questions/Problems
This study will aim to determine the potential of Narra (Pterocarpus indicus) and Madre de Cacao (Gliricidia sepium) bark extract as an alternative ink. Specifically, it will seek to answer the question:
1. Is there will be a significant difference between the experimental ink with different formulations and the commercial ink in terms of: 1.1 color; 1.2 clarity; 1.3 odor; and 1.4 water resistance?
b. Null Hypotheses The researcher will hypothesize that:
1. There will be no significant difference between the experimental ink with different formulations and the commercial ink in terms of: 1.1 color; 1.2 clarity; 1.3 odor; and 1.4 water resistance.

c. Procedure
Making the Product The materials that will be needed are 400 grams of Narra and Madre de Cacao barks each, tray, recycled ballpen containers, 500ml and 100ml beaker, stiring rod, double beam balance, laboratory gloves, glycerin/glycerol, ferrous sulfate, gum Arabic, rubbing alcohol. First, four-hundred grams each of Narra and Madre de Cacao barks will be gathered to Poblacion Bansud, Oriental Mindoro. After gathering the barks, it will be washed using tap water in order to remove the unnecessary dirt on it that may affect the product. The washed barks will be placed on the tray and will be sundried for three days. When the barks are totally dried, it will be cutted into smaller pieces. Then extraction will be done by boiling four-hundred grams each of Narra and Madre de Cacao barks with 700 ml of water for 60 minutes. After the extraction, it will be putted in a 500 ml beaker until it cools. The extract will be served as tannic acid. The experimental set-up consist of three sub set-ups and the controlled set-up. Formulation 1 will be prepared by adding 100ml of